If one of our users forgets to code an invoice to a specific class, the invoice is published straight to our account's software without any approval bypassing vital checks. I would like to see an option in the approval process for a 'no class' i.e. if the class field is left blank it still can be send to an administrative approver - currently the option is 'all class' but if no class is picked this rule doesn't apply and invoices are just published bypassing any approval process, deeming the feature irrelevant.

Alternatively, the invoice could be stopped from being published without having allocated a class i.e. it can be set as a mandatory field.